When I sense manipulation in any form, whether it be in personal relationships (even when my kids' friends do it to them) I just get so mad!!
My mom manipulated my siblings and I. More so after my dad passed away, because she went into some kind of hibernation mode and had no life or friends outside my siblings and my families.
Fast forward 10 years and there was no one but me to take care of her in her last year of life. It was very difficult at times, because she was always butting heads with me. I was not about to be manipulated and it caused a lot of issues with she & I, although she did apologize to me at the end of her final days. (I'm sorry, was all she said and it was non-specific, but I attributed to our last months) It also caused me problems with my brother, who has refused to face his own guilt with things he did in past, and therefore wasn't healthy enough to realize mom was manipulating him. We are not on the best of terms to this day and I am his only living relative. He chose to believe the things she would claim were going on instead of believing my intentions towards her were pure and out of love.
He didn't seem to mind when it came time to go through all her personal effects and household storage, though. I got that job, too. He only complained when he thought I was getting something he wanted.
So - the moral of the story for me is that I won't be manipulated by him either. When he gets abusive with me on the phone or email, I put a stop to it right then & there and don't let him continue. It's hard, because he's my last living immediate relative. I love him, but I can't let him jerk me around with his emotional baggage.